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http://dx.doi.org/10.6116/kjh.2014.29.2.15.

Effects of steamed Polygonatum odoratum extract on inhibition of adipocyte differentiation and lowing lipid in 3T3-L1 adipocytes  

Kang, Byung Tae (Dept. of Food Nutrition, Gimcheon University)
Choe, Won Kyung (Dept. of Food Nutrition, Gimcheon University)
Park, Dong Cheol (Dept. of Hotel Cuisine & Food Service Management, Gimcheon University)
Kim, Jong Kuk (Dept. of Food and Food -Service Industry, Kyungpook National University)
Park, Mora (Dept. of Food and Food -Service Industry, Kyungpook National University)
Kim, Sung Ok (Team for Scientification of Korean Medical Intervention (BK21 Plus) & Dept. of Herbal Pharmacology, Coll. of Oriental Medicine, Daegu Haany Univ.)
Kim, Mi Ryeo (Team for Scientification of Korean Medical Intervention (BK21 Plus) & Dept. of Herbal Pharmacology, Coll. of Oriental Medicine, Daegu Haany Univ.)
Publication Information
The Korea Journal of Herbology / v.29, no.2, 2014 , pp. 15-21 More about this Journal
Abstract
Objectives : The purpose of this study was to investigate inhibitory effects of steamed Polygonatum odoratum extract (POE) on differentiation and adipogenesis in 3T3-L1 adipocytes. Methods : Polygonatum odoratum (P. odoratum) extract was extracted with ethyl acetate. Total phenolic and flavonoid contents in POE were measured for antioxidant activity. The spectrophotometric method was used to determine the DPPH and ABTS radical scavenging activity and ferric-reducing antioxidant potential (FRAP). MTT assay was examined for cell toxicity, oil red O staining was performed for intracelluar adipogenesis in differentiated 3T3-L1 adipocytes. Western blot analysis for measurement of CCAAT/enhancer-binding protein ${\alpha}$ ($C/EBP{\alpha}$), peroxisome proliferator-activated receptor${\gamma}$ ($PPAR{\gamma}$) and AMP-activated protein kinase (AMPK) expressions were performed. Results : The results revealed that POE has antioxidant activities. Contents of total polyphenolics and flavonoids were $50.83{\pm}1.52$ GAE mg/100g dry weight of POE and $17.05{\pm}2.47$ RE mg/100g dry weight of POE, respectively. DPPH radical scavenging activity, and FRAP in 10 mg/ml concentration were $92.1{\pm}0.6%$, $244.8{\pm}9.0{\mu}M$ Fe(II) and ABTS inhibition in 5 mg/ml concentration was $84.8{\pm}4.1%$. Treatment of POE in adipocytes inhibited the differentiation and adipogenesis of 3T3-L1 adipocytes compared to those of vehicle control. Additionally, protein expressions of $C/EBP{\alpha}$ and $PPAR{\gamma}$, major transcription factor for the adipogenic genes, were significantly decreased compared to those of vehicle control (p<0.05). Futhermore, phosphorylation of AMPK was increased in 3T3-L1 adipocytes treated with POE compared to that of vehicle control (p<0.05). Conclusions : we demonstrate that steamed P. odoratum extract (POE) has potentiating antioxidant activities, inhibits differentiation and lipid accumulation and also induces energy expenditure in adipocytes, which may contribute to antiobesity property.
Keywords
Polygonatum odoratum extract; antioxidant activity; $C/EBP{\alpha}$; $PPAR{\gamma}$; 3T3-L1 cells;
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Times Cited By KSCI : 2  (Citation Analysis)
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